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    Re : A noon sight conundrum
    From: Zorbec Legras
    Date: 2003 Nov 24, 13:30 -0500

    ----- Original Message -----
    From: "Noyce, Bill" 
    Date:         Mon, 24 Nov 2003 10:28:13 -0500
    To: NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM
    Subject:      Re: FW: A noon sight conundrum
    
    
    > Since the sun's declination is
    > usually changing slowly
    > This effect is too small to have any practical effect on finding
    > longitude, as far as I know, but the similar effect that arises
    > when you observe from a vessel travling north or south needs to
    > be taken into account.
    >         -- Bill
    
    
    There is a formula to correct the problem of observing the sun by a mouving observer:
    T0 = ((T 1 + T2) /2) + correction
    correction = 15,28 * ( motion in Lat  - motion in dec )*(tan Lat 1 - tan dec 1)
    
    But for some, it is may be not logic enought...
    --
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